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Encyclopedia > Body of mandible
Bone: Body of mandible
Mandible. Outer surface. Side view
Mandible. Inner surface. Side view
Latin corpus mandibulae
Gray's subject #44 172
Precursor 1st branchial arch[1]
Dorlands/Elsevier c_56/12260602

The body of the mandible is curved somewhat like a horseshoe and has two surfaces and two borders. File links The following pages link to this file: Mandible Wikipedia:Grays Anatomy images with missing articles 4 Categories: Public domain images ... File links The following pages link to this file: Mandible Wikipedia:Grays Anatomy images with missing articles 4 Categories: Public domain images ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... In the development of vertebrate animals, the branchial arches (or pharyngeal arches) develop during the fourth and fifth week in utero as a series of mesodermal outpouchings on the left and right sides of the developing pharynx. ... Elseviers logo. ... It has been suggested that this article or section be merged with jaw. ...

Contents

Surfaces

External surface

The external surface is marked in the median line by a faint ridge, indicating the symphysis or line of junction of the two pieces of which the bone is composed at an early period of life.


This ridge divides below and encloses a triangular eminence, the mental protuberance, the base of which is depressed in the center but raised on either side to form the mental tubercle.


On either side of the symphysis, just below the incisor teeth, is a depression, the incisive fossa, which gives origin to the mentalis and a small portion of the orbicularis oris. The Mentalis is a muscle of the human body. ... The orbicularis oris is the sphincter muscle around the mouth. ...


Below the second premolar tooth, on either side, midway between the upper and lower borders of the body, is the mental foramen, for the passage of the mental vessels and nerve. The mental foramen is a foramen in the mandible. ...


Running backward and upward from each mental tubercle is a faint ridge, the oblique line, which is continuous with the anterior border of the ramus; it affords attachment to the depressor labii Inferioris (Quadratus labii inferioris) and depressor anguli oris (Triangularis); the platysma is attached below it. The Depressor labii is part of a small quadrilateral muscle. ... The Depressor anguli oris is a muscle of the human body. ... The platysma is a superficial muscle that stretches from the clavicle to the mandible overlapping the sternocleidomastoid. ...


Internal surface

The internal surface is concave from side to side. Near the lower part of the symphysis is a pair of laterally placed spines, termed the mental spines, which give origin to the genioglossus. The Genioglossus is a muscle of the human body. ...


Immediately below these is a second pair of spines, or more frequently a median ridge or impression, for the origin of the geniohyoid. The Geniohyoid muscle is a narrow muscle situated above the medial border of the mylohyoid muscle. ...


In some cases the mental spines are fused to form a single eminence, in others they are absent and their position is indicated merely by an irregularity of the surface.


Above the mental spines a median foramen and furrow are sometimes seen; they mark the line of union of the halves of the bone.


Below the mental spines, on either side of the middle line, is an oval depression for the attachment of the anterior belly of the digastric. The Digastric is a muscle of the human body. ...


Extending upward and backward on either side from the lower part of the symphysis is the mylohyoid line, which gives origin to the mylohyoid; the posterior part of this line, near the alveolar margin, gives attachment to a small part of the Constrictor pharyngis superior, and to the pterygomandibular raphé. Mylohyoid can refer to: Mylohyoid muscle Mylohyoid line This is a disambiguation page: a list of articles associated with the same title. ... Grays Fig. ...


Above the anterior part of this line is a smooth triangular area against which the sublingual gland rests, and below the hinder part, an oval fossa for the submaxillary gland. The sublingual glands are salivary glands in the mouth. ... The submandibular gland (or submaxillary gland in older references) is one of the salivary glands, responsible for producing saliva. ...


Borders

The superior or alveolar border, wider behind than in front, is hollowed into cavities, for the reception of the teeth; these cavities are sixteen in number, and vary in depth and size according to the teeth which they contain. To the outer lip of the superior border, on either side, the buccinator is attached as far forward as the first molar tooth. Buccinator The buccinator is a muscle of which the bulk of is located in the cheeks. ...


The inferior border is rounded, longer than the superior, and thicker in front than behind; at the point where it joins the lower border of the ramus a shallow groove; for the facial artery, may be present. The facial artery (external maxillary artery in older texts) is a branch of the external carotid artery that supplies structures of the face. ...


This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy after Henry Gray, is an anatomy textbook widely regarded as a classic work on human anatomy. ...


 
 

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